My battery keeps dying (it’s only 6 months old). If I jump start it everything is fine for that day.
However, I only drive the car once a month and when I come back it is kaput again. How long do you have to drive a car to fully recharge the battery?
How long can a battery sit idle?
My Lexus dealer can find nothing wrong with the battery or electrical system. The cars is 12 years old otherwise is perfect condition. 82,000 miles
I have a 93 Caprice that gets driven occasionally (every 2 or 3 weeks). When it is driven, I put 40 to 60 miles on it for the day (no short trips). On top of that I use my Battery Tender once a month or so to top off the battery. The battery is ten years old and starts the car every time. I check the battery voltage and load test it on a regular basis, but I should replace it.
Depending on the alternator to charge a depleted battery puts a lot of stress on it. A Battery Tender is less expensive than a new battery or alternator.
Yes, you are a good candidate for a trickle charger. A modern car has a lot of live electrical systems even when it just sits around going nowhere. It is reasonable to assume a good battery can be drained in a month. A trickle charger should solve your problem.
I had my battery go flat every week in my volvo. The battery was fairly new, it got charged up and then went flat again - drove me nuts. It turned out that after some very hot days (48C) here in Oz, the glovebox door/hatch had warped, so that when the hatch shut, the internal light (inside the glovebox) was still on. Once I realised (by listening to the ‘click’ of the switch), I added some padding to inside the hatch to ensure that when the glovebox door shut, the light went out - ta da!! no more flat batteries!!. And yes, the mechanic can measure these things too, by the way…
Your dealer should have been able to tell you that a car sitting for a month without being driven is a prime candidate for a dead battery. There are certain functions on the car (clock, ECM, security system, etc) that draw electrical current while the car is not being used.
Here’s what I use on lawn equipment and my motorcycle batteries during the winter and the battery is always fully charged when spring arrives. About the same thing as a Battery Tender, but at a fraction of the cost. I’ve owned several of them for 5+ years and they’re all still working. Just plug it in and leave indefinitely.